What does this number measure?
A neutrophil is a specific type of human white blood cell with a lobed nucleus. OpenStax places its diameter at around 10 to 12 µm; this reference adopts 12 µm for the whole cell. This is not the average size of all human cells or the diameter of the nucleus. The DNA comparison conceptually unfolds the diploid nuclear contents before replication; mature red blood cells, which have no nucleus, are not part of this scenario.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Representative diameter chosen from the source's descriptive range of 10 to 12 µm, not a statistical confidence interval. Cell type, state and preparation affect the observed sizes.
Neutrophil: a conceptual cross-section showing a multilobed nucleus and cytoplasmic granules. The cutaway window is an educational convention, not a photographed cell; representative diameter.